<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 100px !important;
        }
    </style>
</head>
<body>
    <form action="http://localhost:8787/" method="POST" enctype="multipart/form-data">
          文件上传：<input type="file" name="f1"><br>
          <input type="submit" value="上传">
    </form>
</body>
</html>